Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Medina County, Ohio
EPA puts Medina County in Zone 2, its middle radon zone, and high results are common there: 43.4% of the 2,139 radon tests reported to CDC (2008 to 2017, laboratory totals) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
43.4%
8.9 pts below OH
- Medina
- 43.4%
- Ohio
- 52.3%
2,139 tests, 2008 to 2017
Median result
3.5pCi/L
Below action level
- Medina
- 3.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
2,139
13th of 79 by tests
- Medina
- 2,139
- Franklin
- 16,142
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Ohio
61 of 79
Lowest quarter
- Medina
- 43.4%
- Pickaway
- 81.4%
By share, of 79 with 30+ tests
Read a result for Medina County
Starts at Medina County's median, 3.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.5 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Medina County's median reported result, 2008 to 2017.
The data
Medina County, At a glance
Medina County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Medina County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Medina County, 2008 to 2017, laboratory
Under 2 pCi/L: 22%2 to 4 pCi/L: 35%4 pCi/L and above: 43%
Of 2,139 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 466 | 21.8% |
| 2 to 4 pCi/L | 744 | 34.8% |
| 4 pCi/L and above | 929 | 43.4% |
What these figures count
These are the 2,139 tests reported to CDC for Medina County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Medina County, Compared
Medina County radon figures, compared
Calculated by Radon411In Medina County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (929 of 2,139) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 7.7 points higher. Across 88 Ohio counties pooled together, 52.3% of tests reached that level, so Medina County runs 8.9 points below its state.
Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 21.7% (Cuyahoga County) to 62.9% (Ashland County). By share, Medina County is 61st of 79 Ohio counties with 30 or more tests for the same period.
Half the tests came in under 3.5 pCi/L and half over it; the single highest reached 115.9 pCi/L. Below the action level, 466 tests (21.8%) came in under 2 pCi/L, against 23.1% statewide, and 744 tests (34.8%) fell between 2 and 4, against 24.6% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 43.4% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 269 tests taken after mitigation in Medina County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Medina County went from 1,399 tests (2005 to 2014) to 2,139 (2008 to 2017), the share going from 41.7% to 43.4%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Medina County, Geology
The ground under Medina County
PredictedUSGS's geologic map puts all of Medina County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Glaciated Plateau, to which USGS gives a radon index of 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Glaciated Plateau | Devonian, Mississippian and Permian carbonates and shales. | Moderate | 11 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Medina County beside the ground around it
Across Ohio 62.8% of the land is rated high; none of Medina County's is. Of the 5 counties that border it, 2 have more high-potential ground, Ashland County the most at 68.5%.
The map rates the ground, not the air in any home.
Local help
Medina County, Local resources
Radon testing and mitigation in Medina County
Listed radon businesses with an address in Medina County:
- Radon Education and Licensing ProgramRadon Education and Licensing Program, run by Ohio Department of Health, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Ohio.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Free radon test kits are available for Ohio homeowners.
- Compare kits
- Professionals in Ohio479 professionals are listed in Ohio.
Listed radon professionals by town: Brunswick, Medina, Wadsworth, Creston
What Ohio's program says
- Phone
- 614-728-0272
- indoor.radon@odh.ohio.gov
- Licensing of radon professionals
This program licenses companies and persons directly involved with the radon testing and mitigation industry.
What it means
Medina County, Questions
Questions about radon in Medina County
Are radon levels high in Medina County?
Over the 2008 to 2017 laboratory totals, 43.4% of the radon tests reported to CDC for Medina County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.5 pCi/L. Of 79 Ohio counties with 30 or more tests for the same period, 60 reported a higher share; pooled, the state comes to 52.3%.
Which counties border Medina County?
Medina County borders 5 counties: Lorain County, Summit County, Wayne County, Cuyahoga County and Ashland County.
Products
Medina County, Products
Testing a home in Medina County
In Medina County, 43.4% of 2,139 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 52.3% pooled across Ohio. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Medina County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
Corentium Home 2 battery digital radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Medina County, Bordering counties
Counties bordering Medina County
Calculated by Radon411- Radon levels in Ashland CountyEPA zone 1
62.9%at or above 4 pCi/L
Median 5.4 pCi/L · 340 tests · 19.5 points above Medina County
- Radon levels in Wayne CountyEPA zone 1
61.8%at or above 4 pCi/L
Median 4.9 pCi/L · 1,074 tests · 18.4 points above Medina County
- Radon levels in Lorain CountyEPA zone 2
45.4%at or above 4 pCi/L
Median 3.6 pCi/L · 3,307 tests · 2.0 points above Medina County
- Radon levels in Summit CountyEPA zone 1
38.7%at or above 4 pCi/L
Median 3.1 pCi/L · 6,486 tests · 4.7 points below Medina County
- Radon levels in Cuyahoga CountyEPA zone 2
21.7%at or above 4 pCi/L
Median 2.0 pCi/L · 10,092 tests · 21.7 points below Medina County
Medina County, Cities and towns
Cities and towns in Medina County
The Census Bureau estimates 185,025 residents in Medina County for July 1, 2025, 2,389 more than in 2020 (+1.3%). That works out to 439 people per square mile of land. No town dominates: Brunswick, the largest, has 35,114 residents, 19.0% of the total. CDC's 2,139 reported tests for 2008 to 2017 work out to 11.6 per 1,000 residents (2025 estimate), close to Ohio's 8.3.
From Brunswick to Gloria Glens Park, CDC publishes no figure by town: each reads Medina County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Brunswick | 35,114 | −0.9% | 19.0% |
| Medina | 25,692 | −1.4% | 13.9% |
| Wadsworth | 24,720 | +2.7% | 13.4% |
| Rittmanextends beyond Medina County | 6,120 | −0.3% | Counted whole |
| Lodi | 2,822 | +2.7% | 1.5% |
| Seville | 2,347 | +0.4% | 1.3% |
| Crestonextends beyond Medina County | 2,143 | +0.3% | Counted whole |
| Westfield Center | 1,217 | +2.5% | 0.7% |
| Spencer | 698 | +2.0% | 0.4% |
| Chippewa Lake | 671 | +2.1% | 0.4% |
| Gloria Glens Park | 377 | +2.2% | 0.2% |
11 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Medina County is counted whole, so it has no share.
Medina County, Homes
Homes in Medina County
Medina County is a place of houses on their own lots: 77% of its 75,705 homes are detached single-family houses, against 69% across Ohio. Much of Medina County is recent building: 26% of its homes have gone up since 2000 and the middle year built is 1984, against 1970 for Ohio. Owners live in 80% of the occupied homes (Ohio: 67%), so for most households a test and a fix are their own to order.
| Homes | Medina County | Ohio |
|---|---|---|
| Housing units | 75,705 | 5,271,573 |
| Detached houses | 77% | 69% |
| In buildings of 5 or more | 12% | 15% |
| Mobile homes | 1% | 4% |
| Built before 1960 | 20% | 38% |
| Built since 2000 | 26% | 16% |
| Middle year built | 1984 | 1970 |
| Owner-occupied | 80% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.